John pattebson



. (No Model.) 2 Sheets-.Sheet 1.

J'. PATTERSON. i PUWEB. HAMMER. No. 244,927. Patented VJuly 261; 1881.

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(No Model.) I, f .l z'sh'eets-sn'eet 2.

y J. PATTERSON.

POWER HAMMER.

No. 244,927. Patente'dJuly 26,1881.

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y Jfymw shaft and the heads JOHN PATTERSON, OE LONDON, ENGLAND.

POWER-HAM MER.

SPECIFICATION forming part of Letters Patent No. 244,927,

dated July 26, 1881.

Application filed April 28, 1881. (No model.)

To all whom #may concern Be it known that I, JOHN PATTERSON, of Inverness Terrace, London, England, have invented a new anduseful Improvementin Power- Hammers, of which the following is a specification.

My invention relates to the springs and ilexible connections employed between the drivingof power-hammers employed for forging, beetling, stampin g, pulping, and for like purposes, all of said purposes being essentially described by and contained within the word hammering.

My invention consists in the combination, with hammer mechanism, of springs'and flexible connections, arranged and operated substantially as hereinafter described and as illustratedin the accompanying drawings, in which similar letters of reference are used to designate like parts in the various figures.

Figure 1 represents a front elevation, partially in section, of the spring and flexible connection. Fig. 2 represents a plan of Fig. 1, and is also shown partially in section. Fig. 3 represents an end elevation of Fig. 1. Fig. 4

. represents the spring and lexible connection as applied to a hammer.

The hammers heretofore employed, as described the United States specifications of Thomas Shaw,No. 52, 894 and Reissue No. 2,398; John Patterson, No. 141,725; William, Joseph, and Samuel Willoughby, No. 153,029, John Patterson, Nos. 179,725 and 211,520, as also in the British specifications of Alfred Vincent Newton, No. 872, dated 24th March, 11866; :John Patterson, No. 16, dated 4th January, 1871, No. 527, dated 27th February, 1871, No. 3,485, dated 10th October, 1874, and No. 587, dated 12th February, 1876, have all been constructed with quarter or semicircular springs, made or built up from one or more pieces or plates of metal, and have been attached to the end of the connecting-rods. All these springs, when in use, are alternately under tension and compression, and the result has been that it is only by the use of the best materials and with the greatest care that springs so manufactured can be made to stand for any len gthened period, while the delay necessitated for re- "beneath the center of the small,

pairing a single broken plate, and the expense and weight of duplicate springs has prevented in some measure the extensive use of the hammers therein described becoming general in mountainous or inaccessible parts of the country.

By the use of my invention the liability of fracture is reduced to a minimum, and owing to the simple arrangement of parts and the lightness of weight of the springs themselves repairs may be readily made and duplicate springs kept iu stock at a nominal cost.

In carrying out my present invention, I dispense with the quarter or semicircular springs, and substitute therefor a rigid metallic arc, A, the terminations of said arc being forked and hooked outward, as shown at a c, so as to receive the trunnions b b of the two shells or cases, B B, which contain the spiral, volute,

or other springs, C C, which rest on the bota tom of the said cases or shells and act on the hammer through the connections D D, their action being governed by means of the slide pieces d d bearing against nuts E E, which are used for the purpose of lightening the springs and increasing their force, the nuts being held in position by means of pins e c, or by cheeknlits. The flexible connections are pivoted arc on the pin F, from which the hammer is suspended, or when hammering textile or other materials, where oil or grease is objectional, I substitute for the pin F and forked connection bands of leather or other suitable material, which are riveted or otherwise secured to the connections D D at the points .r a', said bands passing through a hole in the hammer-head.

The trunnions Z1 b ride freely in the preferably gunmetal bushings g g, while the plates d d serve to keep dust and dirt from the springs O C, and to keep the center line of the flexible connection parallel to the interior faces of the shell, and thus give a parallel thrust upon the springs. Although said springs are alA ways under compression their absolute play is as a ten-inch blow of the hammer-head, for example, only represents an upward or downward movement from the central line of the pin F of five inches, which in an ordinary way means the compression of each spring three-sixteenths of an inch.

Having thus fully described my invention,

suspended rigid frame, A, the cases B B, carrying the springs and the pivoted connections I) D, substantially as described.

and how the saine n1 :my be practically' employed, J OHN PATTERSON. 5 what I claim, and desire to secure by Letters Titnessesz Patent, is- PHILiP M. JUSTICE,

'lhe combination, in npower-lmimner, of a, ALLEN P. JONES. 

